Metal-bending machine



(No Model.)

, P. A. ROLLINS..

METAL BENDING MACHINE.

0. 601,403. 'Patented Mar. 29,1898.

2 Sheets-Sheet 1.

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UNITED STATES PATENT Quince.

FREDRICK A. ROLLINS, OF CAMBRIDGE, MASSACHUSETTS.

METAL-BENDING MACHINE.

SPECIFICATION forming part of Letters Patent No. 601,403, dated March 29, 1898.

Application filed July 26, 1897. Serial No. 645,886. (No model.)

To all whom it may concern:

Be it known that I, FREDRIOK A. RoLLINs, a citizen of the United States, and a resident of Cambridge, in the county of Middlesex and State of Massachusetts, have invented new and useful Improvements in Metal-Bending Machines, of which the following, taken in connection with the accompanying drawings, is a specification.

This invention relates to improvements in metal-bending machines, and it is particularly well adapted for making single or double plumbers hangers of tubular or solid metal, as will hereinafter be more fully shown and described, reference being had to the accompanying drawings, wherein- Figure 1 represents a top plan View of the machine, showing the metal pipe or blank placed in position therein previous to the commencement of the bending operation. Fig. 2 represents a similar top plan view of the machine, showing the metal pipe or blank as partially bent during the bending operation. Fig. 3 represents a central longitudinal section on the line 3 3, shown in Fig. 2. Fig. 4. represents a single and Fig. 5 represents a double plumbers hanger the bending of which is produced by my improved machine.

Similar letters refer to similar parts wher ever they occur on the difierent parts of the drawings.

In the drawings, A represents the base of the machine, which is adapted when in use to be secured by screws B B or suitable fastenin g devices to a bench, table, or other support C, as shown in Fig. 3.

To the base A is secured or cast in one piece a circular work support D, preferably elevated a proper distance above the base A by means of a post or bracket E, as shown in Fig. 3.

F is a vertical spindle journaled in bearings in the work-support D and base A, as shown, and to said spindle is suitably secured the operating-lever G.

To the upper end of the spindle F is detachably secured in any suitable manner a circular disk H.

I is a similar cylindrical disk loosely journaled on a vertical stud or pin 1', secured to the work-support D, as shown.

On the lever G is an upwardly-projecting arm or bracket G, having a screw-threaded perforation adapted to receive the adjustable screw-threaded spindle K, provided at its outer end with a handle or wheel k for turning said screw-spindle K. To the inner end of said screw K is loosely connected the adjustable concave shaper or pressure-block L, as shown.

M is a metal bar or link pivoted at g to the bracket G and adapted to be secured in its inner end to the upper end of the spindle F during the operation of the machine, as shown in Figs. 1, 2, and 3. Said link M serves as a rest or strengthening-bar for the bracket G when the shaper-blockL is forced by the screw K against the metal bar or pipe N during the bending operation.

In Fig. 4;, N represents a single plumbers hanger, and in Fig. 5, N" represents a double plumbers hanger bent into their respective shapes by my improved machine. After such hangers have been bent they are provided at their supporting end or ends with suitable flanged sockets '17,, preferably screwed on the screw-threaded ends of the hangers, as shown, said sockets having perforated flanges, by means of which and suitable fastening-screws they may readily be attached to the desired places where supports for sewer, drain, or other similar pipes are needed.

' In using the machine for the purpose of bending metal bars or pipes the base A is first secured in a suitablemanner to the bench, table, &c., C, after which one end of the bar or pipe N that is to be bent is introduced between the disks H and I, as well as between the disk H and pressure-block L, after which the operator clamps said block against the bar or pipe N by the turning of the pressurescrew K sufficiently to confine said bar or pipe between the disk H and said block L, as fully shown in Fig. 1. The operator then takes hold of the lever G and swings it in the direction of the arrow shown upon it in said Fig. 1, and in so doing the pipeor bar Nis caused to be bent around the disk H, while the yet straight portion of said pipe or bar is being confined between the said disk H and the loosely-rotating disk I. The lever G is turned with the disk H to about the position shown in dotted lines in Fig. 1, thus producing a bent single hanger. (Represented in Fig. 4.)

After the hanger has been bent to the desired form the block L is released from said bent portion of the hanger by unscrewing the screw-shaft K sufliciently to release the hanger from between the disk H and block L, after which the bent hanger is readily withdrawn from the machine. The lever G is then swung back to its original position, (shown in Fig. 1,) another pipe or bar inserted between the disk H and block L and clamped between said parts, and the operation repeated, as. above described.

If it is desired to make what is known as a double hanger, (shown in Fig. 5,) about one-half of the length of the bar or the length of the bar or pipe is introduced between the disk H and block L and clamped into position between said parts, after which thelever G is swung in the direction shown in Fig. 1 until it reaches the position shown in dotted lines in said Fig. 1, when the block L is released and the bent pipe or bar removed.

I-Ieretofore plumbers" hangers had to be made by hand of proper length and ears or flattened portions forged on their supporting ends, requiring the employment of a blacksmith, oftentimes at a distance from the lo-' cality where the plumbing was done, causing unnecessary delay and expense in making such hangers. By my improved bending-machine the hangers, single or double ones, may readily be made at a slight expense in the very room or place where the plumbers are at work, thus saving a great deal of time as well as slight expense.

The device is very simple in operation, light,

and portable, so that it can readily be trans ported to the place where the plumbing is being done.

By this my improved machine pipes or bars may be bent to any desired curvature according to the size of the disk H, which latter is readily removable and may be replaced with another of larger or smaller diameter, according to the curvature desired to be imparted to the metal pipe or bar.

What I wish to secure by Letters Patent and claim is v The herein-described metal-bending ma chine consisting in combination, a work-support D, a spindle journaled therein and a lever and circular disk H, attached to said spindle, an adjustable pressure-block arranged on said lever, a loosely-rotating guide-roller I, between which and the disk H the bar or pipe is guided during the bending operation, and alink M, pivoted to the lever and adapted to be secured to the lever-spindle substantially as and for the purpose set forth.

In testimony whereof I have signed my name to this specification, in the presence of two subscribing witnesses, on this 8th day of July, A. D. 1897.

FRED'RICK A. ROLLINS.

Witnesses:

ALBAN ANDREN, LAURITZ N..M6LLER. 

